Hi, thanks for explaining the situation. It's my first time buying a Topping product, I bought DX3 Pro without hesitation after seeing the test results here.
I have a couple questions. First, is this a problem unique to AK4493/XU208/AK4118 and DX3 Pro, or do other DAC have similar issues?
I am also wondering why Amir doesn't experience the click issue on his pre-production unit during daily use. Was anything changed from pre-production to production unit?
Thanks again for informing us, Mr. Huang. Looking forward to your response.
Here's answer to your questions.
1. We bring in this problem while solving pop noise of AK4493. I don't know other DAC has this problem or not. But our other DAC do not has this problem.
2. Amir's sample also has click sound. But it appear or not, depend on how you use it. So I think Amir does not met that or he did not noticed it.
3. If you ask me what's difference between Amir's sample and retail version? I will tell you they are almost the same. We hope that his tests will truly reflect the situation of our retail products, so we will ensure that at least the audio hardware is same.
Aluminum housing, circuit board, components, even package of Amir's sample are same as retail version because we already finish production of them and Amir's sample is one from them. We did not release because we need time to debug and the user's manual not finished(You can see Amir's user's manual is simple made by a jet printer). So Amir's sample has no different with retail version in spec and test.